CDMS II data from the five-tower runs at the Soudan Underground Laboratory were reprocessed with an improved charge-pulse fitting algorithm .
 Two new analysis techniques to reject surface-event backgrounds were applied to the 612 kg days germanium-detector weakly interacting massive particle ( WIMP ) -search exposure .
An extended analysis was also completed by decreasing the 10 keV analysis threshold to \sim 5 keV , to increase sensitivity near a WIMP mass of 8 GeV/ c ^ { 2 } . After unblinding , there were zero candidate events above a deposited energy of 10 keV and six events in the lower-threshold analysis .
This yielded minimum WIMP-nucleon spin-independent scattering cross-section limits of 1.8 \times 10 ^ { -44 } and 1.18 \times 10 ^ { -41 } cm ^ { 2 } Â at 90 % confidence for 60 and 8.6 GeV/ c ^ { 2 } Â WIMPs , respectively .
This improves the previous CDMS II result by a factor of 2.4 ( 2.7 ) for 60 ( 8.6 ) GeV/ c ^ { 2 } WIMPs .
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